第10题: [单项选择]To compensate for the substantial decline in the availability of fossil fuels in future years, we will have to provide at least an ______ alternative energy source. A. anticipated B. official C. equivalent D. emotional 参考答案:C 答案解析:(equivalent等效的,同等重要的)。句意为:在未来的岁月,为了弥补化石燃料供应大幅度减少带来的损失,我们应当至少提供一种同等重要的替代性能源。A.anticipated被预料的;B.offic